All of our jewelry is guaranteed authentic by our Graduate Gemologist of the Gemological Institute of America (GIA). 14k Yellow Gold Modern Custom Green Genuine Natural Tourmaline Ring 6 (#J7315) 14k yellow gold modern custom green tourmaline ring. There is an emerald cut genuine natural earth mined green tourmaline with medium pine green or slightly yellowish-green color. The tourmaline is partial bezel set one one side and has two prongs on the other side. It measures about 12mm x 10mm. The ring measures 5/8" long and just over 1/2" or 15.7mm wide. The ring fits a size 6 finger, weighs a heavy 7.96 dwt., and is contemporary. Heavy and solid on the underside. We were told by the seller that the rose hallmark pieces were made by Rose Holloway Jewelers in Milwaukee. Lovely! SKU#J7315. 100% Satisfaction Guaranteed!